객관식
Which of the following compounds is a constitutional (structural) isomer of glucose ()?
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1. A Review of General Chemistry
Constitutional Isomers
객관식
Which of the following is a key difference between and ?
A
Both and have the same molecular formula.
B
contains a benzene ring, while does not.
C
is an open-chain alkyne, while is a cyclic compound.
D
is more stable than due to its ring structure.
검증된 단계별 안내1
Identify the structures of butyne and cyclobutyne: butyne is a straight-chain (open-chain) alkyne with a triple bond between two carbon atoms in a four-carbon chain, while cyclobutyne is a cyclic alkyne where the triple bond is part of a four-membered ring.
Recognize that both compounds have the same molecular formula (C4H6), but their connectivity differs due to the presence or absence of a ring.
Understand that the key difference lies in the molecular geometry: butyne is linear or nearly linear around the triple bond in an open chain, whereas cyclobutyne's triple bond is constrained within a small ring, causing significant angle strain.
Recall that cyclobutyne is highly unstable because the linear geometry required by the triple bond conflicts with the small ring size, making it much less common and more reactive than butyne.
Conclude that the main difference is that butyne is an open-chain alkyne, while cyclobutyne is a cyclic alkyne, which affects their stability and chemical behavior.
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